Pregnancy Calendar Week 13

Week 13



What's Happening to My Body?


The countown continues: 13 weeks down, 27 to go. Congratulations, you've officially entered the second trimester! Your baby is now about 2.6 to 3.1 inches long (6.5 to 7.8 centimeters) and weighs about half an ounce (14 to 20 grams). If he was a fruit, he'd be a nectarine.


His eyes are well developed now, but the lids won't open for another four months or so. The face is beginning to look more human. The intestines, which used to be partially housed in the umbilical cord, are now completely contained in the baby's body. His bone marrow, liver and spleen can produce blood cells, so the yolk sac is no longer needed and will soon be detached.


As for you, you've probably gained a few pounds, but your belly isn't too large. Your waist is beginning to disappear, and you may feel more comfortable in loose clothes, but the real weight gain is yet to come. Now might be a good time to put your belts in the back of the closet; you won't be needing them for a while. Basically, you look like you've been hitting the Haagen-Dazs a little too hard.